## Wednesday, January 26, 2011

### Shane's Scribe Post

Questions Number 3 and 5

3.) Find the surface area of this right rectangular prism to the nearest tenth of a square centimetre

Surface Area= 2(18.5)(13.5)+2(18.5)(5)+2(13.5)(5)
= 499.5+185+13 = 697.50 cm

5.) Calculate the surface area of this ramp in the shape of a right triangular prism.

Surface Area= 2(1.4)(2.3)+(2.3+2.7+0.7)
Surface Area= 6.44+5.7 = 12.14 m

Cylinder Volume and Volume Problems

r= d/2
r= 8/2
r= 4 m2

v= π x r x r x h
v= 3.14 x 4 x 4 x 10
v= 501.4 m3

v= l x w x h
v= 2 x 2 x 15
v= 60 m2
The volume of the rectangular prism is 60m.

r= d/2
r= 1/2
r= 0.5 m2

v= π x r x r x h
v= 3.14 x .5 x .5 x 15
v= 11.775 m3
The volume of the cylinder is 11.775 m3

60-11.775
= 48.225
The volume of concrete required for one culvert piece is 48.225 m3.

1. Nice concise post, Shane! Next time add a video or link to enhance your presentation!

2. Not bad, Shane. I agree with Duyen as well. A link to a site and a video would make this post just as helpful. Remember not to use colours unless necessary like when highlighting something important.

3. Good job Shane! I noticed that it's not complete but great job with the pictures. Maybe next time, add a link or something to improve your post.

4. Great job explaining how you got your answer shane. Next time you should add a video and link to make your post deeper to your point.

5. Great job Shane. Great use of colors and well explained post. Next time add a link or video to your post to make it better. Other than that, great job.

6. Great Job Shane. You did a good post! Your pictures were very nice! Next time you could maybe add a link or video.

7. Good job Shane. I like your pictures and I think you should put all the things needed like, the formulas and the square thingy (²). Good job.